39 documents found, page 1 of 4
The value of signal intensity on T1-weighted chemical shift magnetic resonance ...
Dalavia,Claudio Carvalho; Goldman,Suzan Menasce; Melo,Homero José de Farias e; Kater,Claudio Elias; Szejnfeld,Jacob; Iared,Wagner; Ajzen,Sergio AronAbstract Objective: To investigate the advantages of using modified signal intensity measurements on chemical shift imaging alone or in conjunction with proton magnetic resonance spectroscopy in the differential diagnosis of adrenal adenomas. Materials and Methods: This was a prospective study involving 97 patients with adrenal nodules or masses. The signal intensity index (SII) was calculated as [(signal inten...
Impact of PI-RADS v2 on indication of prostate biopsy
Rozas,George de Queiroz; Saad,Lucas Scatigno; Melo,Homero José de Farias e; Gabrielle,Henrique Armando Azevedo; Szejnfeld,JacobABSTRACT Objectives: To identify the group of patients who could safely avoid prostate biopsy based on the findings of multiparametric prostate resonance imaging (MRmp), parameterized with PI-RADS v2, using prostate biopsy as reference test and to assess the sensitivity and specificity of mpMR in identifying clinically significant prostate cancer using prostate biopsy as a reference test. Patients and Methods: ...
Functional magnetic resonance imaging for clinical evaluation of uterine contra...
Fornazari,Vinicius Adami Vayego; Vayego,Stela Adami; Szejnfeld,Denis; Szejnfeld,Jacob; Goldman,Suzan MenasceABSTRACT Uterine contractility out of the gestational phase, during the menstrual cycle and the habitual functional variations of the organ, this is one of the responsible mechanisms for reproduction and fertility, due to its direct action in the mechanisms conducting the spermatozoa to the ovule and in the decidual implantation. Pathologies such as uterine leiomyoma, endometriosis, adenomyosis, polycystic ovar...
Aplicação de um protocolo de espectroscopia por ressonância magnética das adren...
Melo,Homero José de Farias e; Goldman,Suzan M.; Szejnfeld,Jacob; Faria,Juliano F.; Huayllas,Martha K. P.; Andreoni,Cássio; Kater,Cláudio E.Objetivo: Avaliar um protocolo de espectroscopia por ressonância magnética (ERM) do próton de hidrogênio (1H) bidimensional (2D) disponível comercialmente (Siemens Medical Systems; Erlangen, Alemanha), aplicado para nódulos adrenais e diferenciação das massas (adenomas, feocromocitomas, carcinomas e metástases). Materiais e Métodos: Um total de 118 pacientes (36 homens e 82 mulheres), apresentando-se com 138 nó...
Expression of claudin, paxillin and FRA-1 in non-nodular breast lesions in asso...
Kandelman,José David; Waitzberg,Angela Flávia Logullo; Szejnfeld,Jacob; Smith,Ricardo LuizCONTEXT AND OBJECTIVE The possible role of adhesion molecules in early breast carcinogenesis has been shown in the literature. We aimed to analyze early adhesion imbalances in non-nodular breast lesions and their association with precursor lesions, in order to ascertain whether these alterations exist and contribute towards early carcinogenesis. DESIGN AND SETTING Retrospective cross-sectional study based on me...
Evaluation of the efficacy and reproducibility of cholangiopancreatography by m...
Linhares,Marcelo Moura; Coelho,Rafael Darahen de Souza; Szejnfeld,Jacob; Goldman,Susan Menasce; Gonzalez,Adriano Miziara; Szejnfeld,Denis; Matos,CarlaPURPOSE: To evaluate the accuracy and reproducibility of magnetic resonance cholangiopancreatography (MRCP) in the detection of biliary complications in liver transplanted patients. METHODS: A study was conducted, with blinded review of 28 MRCP exams of 24 patients submitted to liver transplantation. The images were reviewed by two independent observers, at two different moments, regarding the degree of biliary...
Risk factors for osteoporotic fractures and low bone density in pre and postmen...
Pinheiro,Marcelo M; Reis Neto,Edgard T dos; Machado,Flávia S; Omura,Felipe; Yang,Jeane H K; Szejnfeld,Jacob; Szejnfeld,Vera LOBJECTIVE: To estimate the prevalence and analyze risk factors associated to osteoporosis and low-trauma fracture in women. METHODS: Cross-sectional study including a total of 4,332 women older than 40 attending primary care services in the Greater São Paulo, Southeastern Brazil, between 2004 and 2007. Anthropometrical and gynecological data and information about lifestyle habits, previous fracture, medical his...
Correlação interobservador das alterações morfológicas das vias biliares em pac...
Sales,Danilo Moulin; Santos,José Eduardo Mourão dos; Shigueoka,David Carlos; Leão,Alberto Ribeiro de Souza; Colleoni Neto,Ramiro; Borges,Durval RosaOBJETIVO: Descrever as alterações das vias biliares pela colangiografia por ressonância magnética (CPRM) na esquistossomose hepatoesplênica e avaliar a concordância interobservador da CPRM na detecção de colangiopatia esquistossomótica. MATERIAIS E MÉTODOS: Estudo prospectivo e transversal em 24 pacientes com a forma hepatoesplênica da esquistossomose mansoni e em 6 pacientes sadios, como grupo controle, com av...
Espectroscopia por ressonância magnética no diagnóstico do câncer de próstata: ...
Melo,Homero José de Farias e; Szejnfeld,Denis; Paiva,Cristiano Silveira; Abdala,Nitamar; Arruda,Homero Oliveira de; Goldman,Suzan MenasceOBJETIVO: Demonstrar a experiência na implantação de um protocolo de espectroscopia por ressonância magnética do 1H tridimensional (3D 1H MRSI), disponível comercialmente, aplicando-o em pacientes com suspeita de neoplasia prostática e com diagnóstico estabelecido de tumor prostático. MATERIAIS E MÉTODOS: Estudo realizado de forma prospectiva, em 41 pacientes com idades entre 51 e 80 anos (média de 67 anos). Do...
Avaliação crítica dos benefícios e limitações da ressonância magnética como mét...
Ximenes,Renato Luis da Silveira; Szejnfeld,Jacob; Ximenes,Andréa Regina da Silveira; Zanderigo,ValdirOBJETIVO: Avaliar, por meio da ressonância magnética, uma série de fetos com diagnóstico ultra-sonográfico de malformação, a fim de estabelecer os benefícios e limites diagnósticos proporcionados pela técnica de ressonância magnética fetal, em comparação com a ultra-sonografia. MATERIAIS E MÉTODOS: Foram estudadas 40 mulheres entre 15-35 semanas de gestação com diagnóstico de anomalia fetal durante o exame de u...